Important Notice: Please update all of your Zoom applications to version 5.0 or higher. After May 30, 2020, all Zoom applications on older versions will receive a forced upgrade when trying to join meetings as GCM Encryption will be fully enabled across the Zoom platform. Learn more on how to update your Zoom application or update now.

Note: As our world comes together to slow the spread of COVID-19 pandemic, the Zoom Support Center has continued to operate 24x7 globally to support you. Please see the updated Support Guidelines during these unprecedented times.

Starting a Telephone-only Meeting with Zoom Rooms Follow


You can start a meeting in Zoom Rooms using only PSTN/Telephony (telephone dialing) audio. In Zoom Rooms, you will need to have a PSTN Phone, VoIP Phone or SIP Dialer (e.g.  Revolabs UC1500/1000) in the room.


  1. Schedule a meeting and select Telephone under the Audio options.
    Web portal:

  2. Start the meeting on the Zoom Rooms controller.  
  3. Click the info icon beside the Meeting ID to display the join details.

  4. On a PSTN phone, VoIP phone or SIP dialer, dial the number, then enter meeting and participant ID.
    Note: Enter the correct participant ID to bind with the Zoom Rooms audio, otherwise you may encounter echo.